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25 Cards in this Set
- Front
- Back
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Meteor
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A chunk of matter that enters Earth's atmosphere and is heated by friction with the air.
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Gravity
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Gravitation is an attractive force between two objects that have mass.
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Comet
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Orbiting body made of dust ice and frozen gas
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Sunspots
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A dark area on the surface of the sun
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Asteroid
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An asteroid is a relatively small rocky object that orbits the sun
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Galaxy
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A galaxy is a huge system of gas dust and stars
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Nuclear Fusion
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In nuclear fusion the nuclei of Atoms fused together to form a large nucleus.
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What are some of the differences between the inner and outer planets?
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Inner planets are small rocky and orbit closer to the sun
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What objects make up the solar system?
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Our solar system is made up of a star - the Sun - eight planets, 146 moons, a bunch of comets, asteroids and space rocks, ice and several dwarf planets, such as Pluto. The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
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Why do the planets not fly off into the universe? What keeps them in orbit?
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The sun has much more mass than all the other planets which keeps all the other planets in the orbit of the sun since the sun has greater mass
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Where does the sun's energy come from?
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The sun generates energy through the process of nuclear fusion. At the core of the sun, gravitational pressure compresses and heats the core material to over 15 million degrees where hydrogen is converted into helium, a process which produces energy. About 600 million tons of hydrogen is converted to energy in the sun every second.
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When will the sun begin to die?
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A sun begins to die when it becomes a red giant
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How does the sun compare to other stars?
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The sun is much smaller than other stars
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What are four effects the Sun has on the Earth?
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When the sun has sunspots they affect Earth's electricity. When they read giant they will destroy Earth. It makes life possible on Earth by giving all life vitamin D. it keeps Earth from going into another ice age.
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What is a nebula? What causes it to collapse into a dense mass?
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a nebula is a enormous rotating cloud of dust and gases. over time gravity and other forces cause the nebula to collapse into a very dense mass.
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Are moons more like planets or more like the Sun? Why?
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Moons are more like planets because they are small and rocky
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Where are most of the asteroids found? Why do you think there are so many found here?
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they are commonly found between mars and jupiter
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What causes the tail of a comet to form?
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streams of dust and gas
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How does the heliocentric model of the solar system differ from the geocentric model?
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Heliocentric means "sun-centered and
Geocentric means "earth-centered" |
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What are these astronomers known for? Galileo, Kepler, and Copernicus
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GALILEO discovered that planets and smaller bodies in the solar system orbit the sun.
COPERNICUS discovered that the sun was the center of the solar system. KEPLER discovered that the planets travel around the sun in elliptical orbits Kepler also discovered that a planet speeds up as it nears the sun and slows down when it is farther away. |
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How does the tilt of Uranus' axis compare with that of other planets?
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the axis of uranus is tilted so much tis nearly parallel to the plain of its orbit compared to other planets uranus is lying on its side.
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How does a space shuttle differ from a space probe?
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A space shuttle Carries a crew and cargo.
A space probe is unmanned video camera/ robot/ space craft. |
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What factors affect the force of gravity between two objects?
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Depends on the the masses of the object and on the distance between them.
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What did Sir Isaac Newton explain about the planets?
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newton found that the sun is the most massive object in our solar system it pulls on the planets keeping them in orbit around it self.
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what separates the inner planets from the outer planets
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They are separated by the astroid belt.
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